Plug connection



Aug. 12 1924.

A. H. KLINE PLUG coNNETIoN Original Filed Sept. 24. 1920 /NvE/Uon A. b. /flzlze ATTORNEYS Patented Aug. 12, 1924.

.ARTHUR E. KLINE, OF CHICAGO, ILLINOIS.

PLUG CONNECTION.

Application led September 24, 1920, Serial No. 412,503.' Renewed June 14, 1924.

To all who/m. 'it may concern:

Be it known that'I, ARTHUR H. KLINE, a citizen of the United States, and a resident of the city of Chicago, in the county of Cook and 'State of Illinois, have invented a new and useful Improvement in Plug Connections, of which the following is a full, clear, and exact description.

My invention relates to improvements in plug connections, of the type in which the plug is provided with spring members arranged to engage .the threads of the screw socket, so as to permit the plug to make instant connection, by thrusting `it directly into the socket, instead ofscrewing it in.

In connections of this type, it often happens that the plug is thrpst into the socket,

so as to eii'ect an electrical connection, if

the plug is held in a certain position, since then the spring portionswill entery the threads of the socket at th position where the contacts are effected, the same as they would be. if the plug had been screwed u tight. When, however, the plug is rotated about its axis, and then thrust in it may not make contact in the ordinary device of this type, because it will not then be in the position corresponding to that when it is screwed into the socket as far as it will go. An object of my invention is to provide a plug which will positively make connection when it is thrust into the sdcket, without necessitating the rotation of the plug about its axis to a particular position.

A. further object of my invention is to provide a plug vmade up of threaded members of insulating material and having conducting members of relatively small area as compared with the insulating portion, thus reducing the liability of short circuiting.

A further object of my invention is to provide a device of the type described, in which the electrical connections to the-cable ends may be eil'ected by removing the pivot pin, around which one of the insulating portions of the device oscillates.

Other objects and advantages will appear in the following specification, and the novel features of the invention willpbe particularly pointed out in the appended claim.`

My invention is illustrated in thelaccompanying drawings, forming part of thisap.- plication, in which Figure 1 is a side view of the device,

Figure 2 isnanend view,

- (see` Figure 4).

at 2 a portion 3, the portions 1 and 3 constituting a cylindrical plug which'is provided with threads 4. The portions 1 and 3 are made of insulating material. As will be seen from Figure 4, the portion 3 is provided with a tongue 5 arranged to enter a recess 6 in the lmember V1, a pintle 7 being ,provided in the form of a screw, which-passes through the tongue 5, the tongue pivoting about the unthreaded portion of the screw. 4

The body portion 1 has a central opening 8, through which a cable 9 is designed to pass. One strand of the cable is designed to be held by a screw 10 in electrical engagement with a metal plate 11, which is held by the screw t0 the insulating body portion. The plate 11 is provided with an extension 12, adapted to pass through an opening 13 in the body portion. The end of the extension 12 is bent u wardly and is 'luted to conform with the t readed portion of the member 1, this threaded portion being disposed in a recess 14. The threaded portion lies normally flush with, or a little bit outside of the threaded ortion of the member 1, so as to afford a good connection when the `lug is inserted. The other strand of tige cable is held by a screw 15, which also holds a metal plate 16 in place. This plate 16 is bent .in Z-shaped form has a collar 18 (see Figure 4) is inserted in registering openings in the Z-shaped plate 16, and is normally pressed on by a spring 19, which tends to keep the pin 17 in an outer position. The Z-shaped metal portion 16 is adapted to enter between two integral guide portions 20, and these guide portions, 1n turn, are arranged to enter a recess 21 in the pivoted portion 3. The latter has a recess 22 for the spring 23, which normally bears a ainst the Z-shaped metal member 16 (as s own in Figure` 4), so as to expand the plu or, in other words, to keep the threade portion of the member 3 normally away from the threaded member l.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood. When A contact pin 17, which` it is-desired to make a quick connection with. the ordinary threaded socket, all that is Anecessary is to insert the end of the plug' in the outer end of the socket, and pus it di rectly into the same. The end of the plug is beveled, as shown at 24, so as topermit it -to enter the socket far enough to cause then closing of the hinged part toward the body portion 1 as the plug is being forced inwardly. The spring 23 keeps the parts in such position as to insure a good contact with the conducting plate 1'2. The central v pin 17 will make a positive connection with the central contact 25 of the socket 26, even ifthe plug has retracted to adjust itself to the' threads of the socket.v There is, it will that the `ton movement 'of said V-shape so as to secure the ends of the cable 9 to the conducting terminals. It will be observed e prevents undue outward the .hinged member 3, but permits sufficient inward movement to enable the socket.

I claim:-

In an electricalconnection, a body portion having a pair of lu adjacent the outer end thereof, a V-shapeS t posed between said lugs, a movable contact pin provided with a shoulder slidably disposed in alined openings ofthe side arms d terminal, and a spring disposed between said shoulder and the in' ner. side arm of said-V-shaped terminal, whereby the shoulder of said pin normally abuts against the outer side arm of 'said V-shaped member.

ARTHUR H. KLINE.

plug to be thrust directly into the' erminal plate dis- 

